Locator/ID Separation Protocol (LISP): Shared Extension Message & IANA Registry for Packet Type Allocations
draft-ietf-lisp-rfc8113bis-03

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LISP                                                        M. Boucadair
Internet-Draft                                              C. Jacquenet
Obsoletes: 8113 (if approved)                                     Orange
Intended status: Standards Track                        January 25, 2019
Expires: July 29, 2019

 Locator/ID Separation Protocol (LISP): Shared Extension Message & IANA
                  Registry for Packet Type Allocations
                     draft-ietf-lisp-rfc8113bis-03

Abstract

   This document specifies a Locator/ID Separation Protocol (LISP)
   shared message type for defining future extensions and conducting
   experiments without consuming a LISP packet type codepoint for each
   extension.

   This document obsoletes RFC 8113.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   Internet-Drafts are draft documents valid for a maximum of six months
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   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on July 29, 2019.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must

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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   2
   3.  LISP Shared Extension Message Type  . . . . . . . . . . . . .   3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   3
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   3
     5.1.  LISP Packet Types . . . . . . . . . . . . . . . . . . . .   3
     5.2.  Sub-Types . . . . . . . . . . . . . . . . . . . . . . . .   4
   6.  Changes from RFC 8113 . . . . . . . . . . . . . . . . . . . .   4
   7.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   5
   8.  Normative References  . . . . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   The Locator/ID Separation Protocol (LISP) base specification,
   [I-D.ietf-lisp-rfc6833bis], defines a set of primitives that are
   identified with a packet type code.  Several extensions have been
   proposed to add more LISP functionalities.  It is expected that
   additional LISP extensions will be proposed in the future.

   The "LISP Packet Types" IANA registry (see Section 5) is used to ease
   the tracking of LISP message types.

   Because of the limited type space [I-D.ietf-lisp-rfc6833bis] and the
   need to conduct experiments to assess new LISP extensions, this
   document specifies a shared LISP extension message type and describes
   a procedure for registering LISP shared extension sub-types (see
   Section 3).  Concretely, one single LISP message type code is
   dedicated to future LISP extensions; sub-types are used to uniquely
   identify a given LISP extension making use of the shared LISP
   extension message type.  These identifiers are selected by the
   author(s) of the corresponding LISP specification that introduces a
   new LISP extension message type.

2.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119][RFC8174] when, and only when, they appear in all
   capitals, as shown here.

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3.  LISP Shared Extension Message Type

   Figure 1 depicts the common format of the LISP shared extension
   message.  The type field MUST be set to 15 (see Section 5).

        0                   1                   2                   3
        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       |Type=15|        Sub-type       |   extension-specific          |
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
       //                    extension-specific                       //
       //                                                             //
       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

               Figure 1: LISP Shared Extension Message Type

   The "Sub-type" field conveys a unique identifier that MUST be
   registered with IANA (see Section 5.2).

   The exact structure of the 'extension-specific' portion of the
   message is specified in the corresponding specification document.

4.  Security Considerations

   This document does not introduce any additional security issues other
   than those discussed in [I-D.ietf-lisp-rfc6833bis].

5.  IANA Considerations

5.1.  LISP Packet Types

   IANA has created a protocol registry for LISP Packet Types, numbered
   0-15.

   Values can be assigned via Standards Action [RFC8126].  Documents
   that request for a new LISP packet type may indicate a preferred
   value in the corresponding IANA sections.

   IANA is requested to replace the reference to RFC8113 with the RFC
   number to be assigned to this document.

   Also, IANA is requested to update the table as follows:

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   OLD:

   Message                           Code    Reference
   ================================= ==== ===============
   LISP Shared Extension Message     15      [RFC8113]

   NEW:
   Message                           Code    Reference
   ================================= ==== ===============
   LISP Shared Extension Message     15      [ThisDocument]

5.2.  Sub-Types

   IANA has created the "LISP Shared Extension Message Type Sub-types"
   registry.  IANA is requested to update that registry by replacing the
   reference to RFC8113 with the RFC number to be assigned to this
   document.

   The values in the range 0-1023 are assigned via Standards Action.
   This range is provisioned to anticipate, in particular, the
   exhaustion of the LISP Packet types.

   The values in the range 1024-4095 are assigned on a First Come, First
   Served (FCFS) basis.  The registration procedure should provide IANA
   with the desired codepoint and a point of contact; providing a short
   description (together with an acronym, if relevant) of the foreseen
   usage of the extension message is also encouraged.

6.  Changes from RFC 8113

   The following changes were made from RFC 8113:

   o  Change the status from Experimental to Standard track.

   o  Indicate explicitly that the shared extension is used for two
      purposes: extend the type space and conduct experiments to assess
      new LISP extensions.

   o  Delete pointers to some examples illustrating how the shared
      extension message is used to extend the LISP protocol.

   o  Request IANA to update the "IANA LISP Packet Types" and "LISP
      Shared Extension Message Type Sub-types" registries to point to
      this document instead of RFC8113.

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7.  Acknowledgments

   This work is partly funded by ANR LISP-Lab project #ANR-13-INFR-
   009-X.

   Many thanks to Luigi Iannone, Dino Farinacci, and Alvaro Retana for
   the review.

   Thanks to Geoff Huston, Brian Carpenter, Barry Leiba, and Suresh
   Krishnan for the review.

8.  Normative References

   [I-D.ietf-lisp-rfc6833bis]
              Fuller, V., Farinacci, D., and A. Cabellos-Aparicio,
              "Locator/ID Separation Protocol (LISP) Control-Plane",
              draft-ietf-lisp-rfc6833bis-23 (work in progress), December
              2018.

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

   [RFC8126]  Cotton, M., Leiba, B., and T. Narten, "Guidelines for
              Writing an IANA Considerations Section in RFCs", BCP 26,
              RFC 8126, DOI 10.17487/RFC8126, June 2017,
              <https://www.rfc-editor.org/info/rfc8126>.

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/info/rfc8174>.

Authors' Addresses

   Mohamed Boucadair
   Orange
   Rennes  35000
   France

   EMail: mohamed.boucadair@orange.com

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   Christian Jacquenet
   Orange
   Rennes  35000
   France

   EMail: christian.jacquenet@orange.com

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